Bi-directional Driving Mode Transition Safety Monitoring
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Solution Overview
Problem
Current systems for transitioning between autonomous and manual driving modes lack robust safety measures, particularly in addressing functional safety concerns such as driver misuse, sensor performance limitations, and unforeseen environmental changes, which can lead to accidents.
Innovation Solution
The implementation of a redundant safety monitoring system that includes bi-directional mode transition protocols, torque, and time limitations, along with dynamic safety boundary checks, ensures safe transitions between autonomous and manual driving modes by monitoring and confirming driver presence, vehicle health, and environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant safety monitoring system with bi-directional mode transition protocols is implemented, then safety and reliability of mode transitions are improved, but device complexity increases
Solution Approach 1:
The safety monitoring system is divided into distinct functional modules including driver presence monitoring, vehicle health monitoring, environmental condition monitoring, and torque limitation enforcement. Each module independently monitors specific parameters and can trigger mode transition restrictions, allowing the complex safety system to be managed through modular, manageable components that collectively ensure reliable mode transitions
Solution Approach 2:
The system introduces an intermediary safety monitoring layer that sits between the autonomous driving system and manual driving system. This intermediary continuously evaluates multiple safety parameters (driver presence, vehicle health, environmental conditions) and acts as a gatekeeper that can prevent unsafe mode transitions, thereby improving reliability without requiring direct integration between the autonomous and manual driving systems
2Reliability
If dynamic safety boundary checks and redundant monitoring are performed during mode transitions, then functional safety concerns are addressed, but transition time increases
Solution Approach 1:
The system performs preliminary safety checks and driver presence monitoring continuously even before a mode transition is requested. By maintaining ongoing monitoring of safety parameters in advance, the system avoids performing comprehensive checks from scratch during the actual transition moment, thereby reducing the time penalty of safety monitoring while ensuring functional safety requirements are met
3Reliability
If torque limitations and time limitations are enforced during mode transitions, then vehicle control safety is improved, but ease of operation decreases
Solution Approach 1:
The torque limitations and time limitations are implemented as dynamic constraints that adapt based on the current driving context and safety conditions. The system monitors driver input in real-time and applies torque restrictions only when safety boundaries are approached or violated, rather than imposing static limitations. This dynamic approach ensures vehicle control safety while minimizing interference with normal driver operation and maintaining ease of use during safe operating conditions
Data Source
AI summary
Embodiments of the present disclosure are directed to switching a driving mode of a vehicle. A mode change request from one of a plurality of sources to switch the vehicle from a first driving mode to a second driving mode is received. In response to receiving the mode change request, a status of the vehicle is accessed, and a confirmation request is transmitted to the one of the plurality of sources. Verification of the confirmation request is made, and a driving transition mode is initialized from the first driving mode to the second driving mode based on the status of the vehicle. In response to adhering to safety conditions or safety boundaries within a duration of time, a switching signal is sent to the control system of the vehicle to switch the vehicle from the first driving mode to the second driving mode.